8318036
Description
Mind Map by Lily O'Brien, updated more than 1 year ago
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Created by Lily O'Brien
over 7 years ago
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B3 - The breathing system
- The lungs are in the thorax (top part of your body). It is seperated by the lower part (abdomen) by the diaphragm
- Protected by the ribcage
- Air goes in the trachea which splits into 2 tubes called bronchi, one going to each lung
- Bronchi split into progressively smaller tubes called bronchioles
- End at small bags called alveoli where gas exchange take splace
- End at small bags called alveoli where gas exchange take splace
- Bronchi split into progressively smaller tubes called bronchioles
- Protected by the ribcage
- Ventilation is breathing in and out
- IN- intercostal muscles and diaphragm contract, thorax volume
increases, this decreases the pressure drawing ait in.
- OUT- Intercostal muscles and diaphragm relax, thorax volume
decreases,this increases the pressure, so air is forced out
- IN- intercostal muscles and diaphragm contract, thorax volume
increases, this decreases the pressure drawing ait in.
- Artificial ventilators help people breathe
- Ventilators are machines that move air into or out of lungs. They help people who can't
breathe by themseleves eg: if they're under general anaesthetic or have a lung injury
- They used to be in a giant case (an iron lung) from the neck to the
abdomen. Air was pumped out of the case, pressure dropped, the
lungs expanded and so air was drawn into the lungs. Air pumped
into the case had the opposite effect, forcing air out of the lungs.
However this could interfere with blood flow to the lower body.
- They used to be in a giant case (an iron lung) from the neck to the
abdomen. Air was pumped out of the case, pressure dropped, the
lungs expanded and so air was drawn into the lungs. Air pumped
into the case had the opposite effect, forcing air out of the lungs.
However this could interfere with blood flow to the lower body.
- Ventilators are machines that move air into or out of lungs. They help people who can't
breathe by themseleves eg: if they're under general anaesthetic or have a lung injury
- Nowadays, most ventilators
work by pumping air into the
lungs. This expands the
ribcage- when they stop
pumping, the ribcage relaxes
and pushes air back out of
the lungs. This doesn't
interfere with blood flow but
it can occasionally cause
damage (burst alveoli) if the
lungs can't cope with the
artificial air flow.
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